Reverse gearing



Dec. 31, 1940. P. GRUNSTRA, JR 2,225,661

REVERSE GEARING Filed Feb. 9, 1939 l 2 SheetS-Sheel l I Inventor D90 31, 1940` P. GRUNSTR, JR

REVERSE GEARING'v 2 Sheets-Sheet 2 Filed Feb. 9, 1939 Patented Dec.`3l,' 1946 UNITED STATE-s PATENT OFFICE l iclalm.

The present invention relates to new and useful improvements in reverse gearings and has for its primary object to provide, in a manner as hereinafter set forth', a device of this character comvprising a construction which is such that the driven shaft will be actuated in either direction at the same speed as the drive shaft.

Another very important object of the invention is to provide a reverse gearing of the aforemenl tioned character comprising control means of a novel construction and arrangement.

Other objects of the invention are to provide a reverse gearing of the character described which will be comparatively simple in construction.

18 strong, durable, highly efllcient and reliable in operation, compact and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification,v

i taken in connection with the accompanying drawings wherein like characters oi reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a view in vertical longitudinal section through a reverse gearing constructed in accordance with the present invention.

Figure2 is a view in front elevation of the device.

80 Figure 3 is a cross sectional view, taken substantially on the line 3-3 of Fig. 1.

Figure 4 is a cross sectional View, taken substa'ntially on the line 4-4 of Fig. 1.

Figure 5 is a top plan view, showing means for operating the brake band.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a drive shaft I which may be connected with` any suitable source of power, such as an engine. Aligned with the drive shaft I is a driven shaft 2. Keyed on the drive'shaft I is a beveledgear 3. A substantially similar gear 4 is splined on the adjacent end portion of the driven shaft 2. A rotary case 5 encloses the gears 3 and 4. Mounted in the case 5 and extending between the opposed ends of the shafts I and 2 is a shaft 6 which is retained by cotter pins 1.' Journaled on the shaft 6 in the case 5 are intermediate beveled gears 8 which operatively connect the gears 3 and 4.

Projecting from the periphery of the case 5 is an integral flange 9. 'Ihe reference numeral I8 I designates a drum which is secured to the ange 8 by stud bolts I I. As shown to advantage in Fig. 1 of the drawings, the drum I8 encloses the maior (ci. 'x4-asm l portion oi the case 6. Encircling the drum IIi is a brake band I2 which, when applied, is adapted to secure said drum against rotation. The drum l0 has formed in its periphery a channel I3 which receives the brake band I2. Brackets I3 are provided on the brake band I2 for mounting on a suitable support. I

Rising from oney end portion of the split :l l1 band I2 is a pair ot spaced lugs I5. Rising from the other end portion of the brake band I2 is an 1o apertured ear I6. The reference numeral Il designates a yoke having a shank I8 on its bight portion anchored in the ear I6 by a nut I9. Journaled in the yoke I1 is a roller 20. 'I'he reference numeral 2I designates a rod having a wedge 22 on 15 p one end slidable in the yoke I'I between the lugs I5 and the roller 20 for contracting the brake band I2 onthedrumlll. s

The drum I0 extends rearwardly beyond the case 5 and has formed therein an integral clutch '20 ange 23. Frictionally engageable with the forward face of the clutch iiange 23 is a clutch plate 2a having a rearwardly extending hub portion 25 which is keyed on the driven shaft 2. Mounted on the rear end portion of the hub 25 is a collar 25 26. Longitudinally shiftable clutch plates 21 and 28 are splined, as at 29, in the open rear end portion'of the drum I0. The reference numerals 30 and 3i designate clutch plates which are splined von the hub 25, as at 32. It will be noted that the 30 plate 3l is mounted between the plate 28 and the clutch ange 23 and that the plate 30 is mounted between the plates 21 and 28. Slidably and rotatably mounted on the driven shaft 2 is a sleeve 33. Radiating from the for- 35 ward end portion of the sleeve 33 are ears 34. Projecting rearwardly from the clutch plate 21 is aplurality of arms 35. The reference numeral 36 designates levers having one end pivotally connected to the forward portions oi the arms 35, as 40 at 31. -Fingers 38 on the pivoted ends of the levers 36 are engaged with the collar 26 `for operatively connecting said collar to said levers. Links 39 on the free ends of the levers 36 are pivotally connected to the ears 34 by pins 48. l'I'he rear 45 end portions of the arms 35 extend between the ears 34 and the links 38. Formed in the rear' end portions of the arms 35 are longitudinal slots 4I through which the pins 40 pass. In this manner the longitudinally slidable sleeve 33 is connected 50 to the drum I0 for rotation therewith.

The reference numeral 42 designates a clutch and brake operating lever' which is adapted to have one end 43 pivotally connected-to a suitable support. The other end of the lever 42 is con- 55 adapted to be actuated bythe lever 4,2.

VItisthought thattheoperationofthedevice will be readily apparent from a consideration of the foregoing. Briefly, with the brake and clutch elements disengaged the drinn Il and the case I are free to rotate and no motion is transmitted totheshaft 2. Whenforwarddrive oftheshaft 2 with the shaft I is desiredthelever l! is swung rearwardly thus leaving the brake l2 disengaged but engaging the clutch elements through the links 39, the levers 3l, the collar 26, etc.; thereby locking the drum IB to the shaft 2 and providing a direct drive from the shaft I to said shaft 2. When it is desired to reverse the shaft 2, the lever 42 is swungforwardlyin a mannertorelease the clutch andrapply the brake l2 thereby locking the drum I and the case I against rotation. Whenthisoccurstheshaftzis drivenatthesame speed as the shaft l but in the opposite direction through the gears 3, I and l.

It is believed that-the many advantages of a reverse gearing constructed in accordancewlth the present invention will be readily understood and although a preferred embodiment of the .de-

ment of `parts may be resorted to which will fall withimthe scope of the invention as claimed.

what n calmes is: Inadeviceoftheclassdescribed,acasing, av shaft passing diametrlcally through the casing, beveled pinions carried by the shaft within the casing and spaced apart, a drive shaft extending into one end of the casing. a driven shaft extending into the opposite end thereof, beveled gears on said ends of the drive and driven shafts, said nected with the sleeve and the rear part of the housing, respectively, and overlapping each other,

a lever, means for connecting one end of the lever to the brake band, means including a sleeve on the driven shaft for actuating the clutch means A and means for moving the sleeve longitudinally byV said lever.

PETER GRUNSTRA, Jn. 

